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Special starch/PLA-PGA-PBAT biodegradable compostable material and preparation method thereof

A biodegradable, special material technology, applied in the field of preparation, can solve the problems of consuming oil and energy, endangering human health, aggravating the greenhouse effect of white pollution, etc., and achieving the effect of improving mechanical properties and enhancing binding force

Pending Publication Date: 2021-09-24
杨如麟 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in recent years, the shortage of resources and the environmental situation have become more and more severe. The extensive use of plastics not only consumes oil and energy, but also releases a large amount of toxic gases when burned because it cannot be degraded naturally, polluting the air and endangering human health. Partially caused and aggravated the "white pollution" and "greenhouse effect", and the environmental carrying capacity has encountered unprecedented challenges

Method used

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  • Special starch/PLA-PGA-PBAT biodegradable compostable material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0040] Its preparation method of a kind of starch / PLA-PGA-PBAT biodegradable & compostable special material, comprises the following steps:

[0041] S1: Put starch, ethylene glycol, calcium stearate, diphenylmethane diisocyanate, titanium dioxide, and antioxidant into a high-speed stirrer that has been preheated to a constant temperature of 50-100°C and stir at high speed ;

[0042] S2: When the temperature of the material reaches 100-140°C, add polylactic acid, polyglycolic acid, and polybutylene adipate terephthalate and stir at a low speed for 1-3 minutes, then put it in a cooling mixer and cool down to 60-80°C Discharge spare;

[0043] S3: Put the premixed material obtained in step S2 into a twin-screw granulator with constant temperature at 180°C to 230°C, which is equipped with more than two exhaust ports, to melt, blend, extrude and granulate to obtain starch / PLA-PGA-PBAT Biodegradable & compostable special material.

[0044] The present invention adopts PLA, PGA, PB...

Embodiment 1

[0049] Its preparation method of a kind of starch / PLA-PGA-PBAT biodegradable & compostable special material, comprises the following steps:

[0050] S1: Put 20kg of corn starch, 5kg of hydroxypropyl starch, 1.4kg of ethylene glycol, 0.2kg of calcium stearate, 0.1kg of MDI, 0.6kg of titanium dioxide, and 0.5kg of antioxidant (1010) into the preheated constant temperature to 90 Stir at high speed in a high-speed stirrer at ℃;

[0051] S2: When the temperature of the material stirred at high speed in step S1 rises to 120°C, add 40kg of polylactic acid, 15kg of polyglycolic acid, and 20kg of polybutylene adipate terephthalate and stir for 2 minutes at a low speed, then put it into a cooling mixer Cool down to 70°C and discharge for later use;

[0052] S3: Put the premix obtained in step S2 into a constant temperature twin-screw granulator at 220°C with two or more exhaust ports to melt, blend, extrude and granulate to prepare starch / PLA-PGA-PBAT biodegradable & Compostable speci...

Embodiment 2

[0055] Its preparation method of a kind of starch / PLA-PGA-PBAT biodegradable & compostable special material, comprises the following steps:

[0056] S1: Put 24kg of corn starch, 6kg of hydroxypropyl starch, 1.8kg of ethylene glycol, 0.2kg of calcium stearate, 0.15kg of MDI, 0.6kg of titanium dioxide, and 0.5kg of antioxidant (1010) in proportion by weight. Stir at high speed in a high-speed stirrer that has been preheated to a constant temperature of 90°C;

[0057] S2: When the temperature of the material stirred at high speed in step S1 rises to 120°C, put in 40kg of PLA, 20kg of PGA, and 10kg of PBAT and stir at a low speed for 2 minutes, put it in a cooling mixer and cool it down to 40°C, and discharge it for later use;

[0058] S3: Put the premix obtained in step S2 into a constant temperature twin-screw granulator at 220°C with two or more exhaust ports to melt, blend, extrude and granulate to prepare starch / PLA-PGA-PBAT biodegradable & Compostable special material.

[...

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Abstract

The invention discloses a special starch / PLA-PGA-PBAT biodegradable compostable material and a preparation method thereof. The special starch / PLA-PGA-PBAT biodegradable compostable material comprises the following components: starch, polylactic acid, polyglycolic acid, poly (butylene adipate-co-terephthalate), ethylene glycol, calcium stearate, diphenylmethane diisocyanate, an antioxidant and titanium dioxide. The diphenylmethane diisocyanate is used as a compatilizer and is prepared by reacting free amine with phosgene, and the diphenylmethane diisocyanate is used for reducing the interfacial tension among polylactic acid, polyglycolic acid and starch and enhancing the interphase binding force, so that the effect of improving the mechanical property is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation methods, in particular to a starch / PLA-PGA-PBAT biodegradable & compostable special material and a preparation method thereof. Background technique [0002] Since its invention, plastic has been widely used all over the world due to its advantages of light weight, waterproof, durable, mature production technology and low cost, bringing great convenience to people's life. my country's annual consumption of plastics is about 40 million tons, of which plastic tableware and packaging materials produce 10% of domestic waste, urban and rural waste and non-degradable plastic waste scattered everywhere, which mainly includes plastic bags, disposable plastic Tableware, cups and plates, plastic beverage bottles, yogurt cups, ice cream bags, etc. Plastic waste is actually "permanent" "white pollution" of "visual pollution" and "potential pollution" that cannot be degraded. How to deal with plastic waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L67/02C08K13/02C08K5/29
CPCC08L67/04C08L2201/06C08L2205/025C08L2205/035C08L3/02C08L67/02C08K13/02C08K5/29
Inventor 杨如麟王秋萍侯世荣林奇勇
Owner 杨如麟
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